rql #20111 implement relation paths [open]

With inspiration from http://www.w3.org/TR/sparql11-property-paths/ let's implement the equivalent in RQL.

Any X WHERE X is Ticket, X concerns P, P name "rql"

could be written as

Any X WHERE X is Ticket, X concerns/name "rql"

priorityimportant
typeenhancement
done in<not specified>
closed by<not specified>

Ticket #20111 - latest update on 2019/10/29, created on 2010/02/04 by Nicolas Chauvat